Devil's advocate:
I could practically feel future generations of Internet historians gnashing their teeth - kill switches in the name of security make our digital artifacts more and more ephemeral - to the people using and generating them, not to the vaults of intelligence agencies of course. And looking ahead, even a few decades old data collections can easily be conveniently forgotten about, or lost, during periods when their existence would be politically inconvenient. "The flood of 2055 was extremely useful, it buried a huge amount of embarrassing junior civil servant mishaps." / "Too bad about the Internet Archive becoming liable for the content it was archiving and having to dump it in 2038 after changes in legislation"